<template>
    <div>
        <el-card>
            <el-alert
                    title="注意：只允许为第三级分类设置相关参数"
                    type="warning" :closable="false" show-icon>
            </el-alert>
            <!--选择商品分类区域-->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类</span>
                    <!--选择商品分类的级联-->
                    <el-cascader
                            v-model="selectedKeys"
                            :options="cateList"
                            :props="cascader"
                            @change="handleChange" clearable></el-cascader>

                </el-col>
            </el-row>
            <!--            tab-->
            <el-tabs v-model="activeName" @tab-click="handleClick">
                <el-tab-pane label="动态参数" name="many">
                    <el-button size="mini" type="primary" :disabled="isBtnDisabled" @click="dialogVisible=true">添加参数
                    </el-button>
                    <!--            动态参数表格-->
                    <el-table :data="manyTableData" border stripe>
                        <!--                        展开行-->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row,scope.row)">
                                    {{item}}
                                </el-tag>

                                <el-input
                                        class="input-new-tag"
                                        v-if="scope.row.inputVisible"
                                        v-model="scope.row.inputValue"
                                        ref="saveTagInput"
                                        size="small"
                                        @keyup.enter.native="handleInputConfirm(scope.row)"
                                        @blur="handleInputConfirm(scope.row)"
                                >
                                </el-input>
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!--                        索引列-->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <el-tab-pane label="静态属性" name="only">
                    <el-button size="mini" type="primary" :disabled="isBtnDisabled" @click="dialogVisible=true">添加属性
                    </el-button>
                    <el-table :data="onlyTableData" border stripe>
                        <!--                        展开行-->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i)">
                                    {{item}}
                                </el-tag>

                                <el-input
                                        class="input-new-tag"
                                        v-if="scope.row.inputVisible"
                                        v-model="scope.row.inputValue"
                                        ref="saveTagInput"
                                        size="small"
                                        @keyup.enter.native="handleInputConfirm"
                                        @blur="handleInputConfirm"
                                >
                                </el-input>
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!--                        索引列-->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>

        </el-card>

        <el-dialog
                :title="'添加'+title"
                :visible.sync="dialogVisible"
                width="30%" @close="addDialogClosed">
            <el-form :model="addParamForm" :rules="addParamFormRules" ref="addParamFormRef" label-width="100px"
                     class="demo-ruleForm">
                <el-form-item label="活动名称" prop="name">
                    <el-input v-model="addParamForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                activeName: 'many',
                selectedKeys: [],
                cascader: {
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children',
                    expandTrigger: 'hover'

                },
                cateList: [],
                manyTableData: [],
                onlyTableData: [],
                dialogVisible: false,
                addParamForm: {
                    attr_name: '',
                    attr_id:null
                },
                addParamFormRules: {
                    attr_name: [
                        {required: true, message: '请输入参数名称', trigger: 'blur'},
                    ]
                }
            };
        },
        created() {
            this.getCateList();
        },
        methods: {
            //删除对应的参数可选项
            handleClose(i,row){
                row.attr_vals.splice(i,1)
            },
            showInput(row) {
                row.inputVisible = true;
                this.$nextTick(_ => {
                    this.$refs.saveTagInput.$refs.input.focus();
                });
            },
           async handleInputConfirm(row){
                if(row.inputValue.trim().length===0){
                    row.inputValue=''
                    row.inputVisible=false
                    return
                }
                row.attr_vals.push(row.inputValue.trim())
                row.inputValue=''
                row.inputVisible=false
                //发起请求保存
               const {data:res}= await  this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                    attr_name:row.attr_name,
                    attr_sel:row.attr_sel,
                    attr_vals:row.attr_vals.join(' ')
                })
               if(res.meta.status!=200){
                   return this.$message.error("修改失败")
               }else{
                   this.$message.success("修改成功")
               }
            },
             removeParams(attr_id){
               this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                   confirmButtonText: '确定',

                   cancelButtonText: '取消',
                   type: 'warning'
               }).then(async () => {
                   const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`);
                   if (res.meta.status !== 200) {
                       this.$message.error("删除失败")
                   } else {
                       this.$message.success("删除成功")
                       this.getUserList()
                   }
               }).catch(() => {
                   this.$message({
                       type: 'info',
                       message: '已取消删除'
                   });
               });
            },
            handleClick(tab, event) {
                this.getParamsData()
            },

            showEditDialog(o){
                const obj= JSON.parse(JSON.stringify(o))
                this.addParamForm=obj;
                this.dialogVisible=true;
            },
            addDialogClosed() {
                console.log(1)
                this.$refs.addParamFormRef.resetFields()
            },
            async getCateList() {
                const {data: res} = await this.$http.get("categories");

                if (res.meta.status != 200) {
                    this.$message.error("获取父级数据失败")
                } else {
                    this.cateList = res.data
                }
            },
            async getParamsData() {
                if (this.selectedKeys.length !== 3) {
                    this.selectedKeys = []
                    return;
                } else {
                    const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: this.activeName}})
                    if (res.meta.status != 200) {
                        this.$message.error("获取数据失败")
                    } else {
                        if (this.activeName === 'many') {
                            res.data.forEach(item=>{
                                item.attr_vals= item.attr_vals?item.attr_vals.split(' '):[]
                                //控制文本框的显示与隐藏
                                item.inputVisible=false
                                item.inputValue=''
                            })
                            this.manyTableData = res.data;
                        } else {
                            this.onlyTableData = res.data
                        }

                    }

                }
            },
            //选择项发生变化触发这个函数
            handleChange() {
                this.getParamsData()
            },
            addParams() {
                this.$refs.addParamFormRef.validate(async valid => {
                    if (!valid) {
                        return
                    }
                    const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`,
                        {
                            attr_name: this.addParamForm.attr_name,
                            attr_sel: this.activeName
                        }
                    )
                    if(res.meta.status!==201){
                        this.$message.error("添加失败")
                    }else{
                        this.$message.success("添加成功")
                        this.addDialogClosed
                        this.getParamsData()
                    }
                })
            },

        },
        computed: {
            //如果按钮需要背禁用返回true，否则返回false
            isBtnDisabled() {
                if (this.selectedKeys.length !== 3) {
                    return true
                } else {
                    return false
                }
            },
            //当前选中的三级分类id
            cateId() {
                if (this.selectedKeys.length === 3) {
                    return this.selectedKeys[2]
                } else {
                    return null
                }
            },
            //动态计算标题文本
            title() {
                if (this.activeName === 'many') {
                    return "动态参数"
                } else {
                    return "静态属性"
                }
            }
        }
    }

</script>
<style lang='less' scoped>
    .cat_opt {
        margin: 15px 0
    }
    .el-tag{
        margin:5px
    }
</style>